Lesson 9.2 Linear Functions Determine if the graph of the relation is a linear function. 21. 24. 26. 28. 2 543 -2 -1 1 -1 -2 y² = 2x+1 y=x y=0.5x-2015 Choices for 21-29: 22. Determine if the following equations are linear functions. Verify by using a graphing utility if possible. A) Linear function 25. 27. -1 29. 2 -H -1 3x+y=-1 2 y = - +1 X 4x+2y-z=0 23. B) Not a linear function 54-3-2-1 2 -1 -2 2 BAD

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